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/*
* Copyright 2023 jacqueline <me@jacqueline.id.au>
*
* SPDX-License-Identifier: GPL-3.0-only
*/
#include "ui/screen_lua.hpp"
#include "core/lv_obj_tree.h"
#include "lua.h"
#include "lua.hpp"
#include "lua/property.hpp"
#include "ui/themes.hpp"
#include "lua/lua_thread.hpp"
#include "luavgl.h"
namespace ui {
namespace screens {
Lua::Lua() : s_(nullptr), obj_ref_() {
themes::Theme::instance()->ApplyStyle(root_, "root");
}
Lua::~Lua() {
if (s_ && obj_ref_) {
luaL_unref(s_, LUA_REGISTRYINDEX, *obj_ref_);
}
}
auto Lua::onShown() -> void {
callMethod("onShown");
forEachBinding([&](lua::Binding* b) { b->active = true; });
}
auto Lua::onHidden() -> void {
callMethod("onHidden");
forEachBinding([&](lua::Binding* b) { b->active = false; });
}
auto Lua::canPop() -> bool {
if (!s_ || !obj_ref_) {
return true;
}
lua_rawgeti(s_, LUA_REGISTRYINDEX, *obj_ref_);
lua_pushliteral(s_, "canPop");
if (lua_gettable(s_, -2) == LUA_TFUNCTION) {
// If we got a callback instead of a value, then invoke it to turn it into
// value.
lua_pushvalue(s_, -2);
lua::CallProtected(s_, 1, 1);
}
bool ret = lua_toboolean(s_, -1);
lua_pop(s_, 2);
return ret;
}
auto Lua::SetObjRef(lua_State* s) -> void {
assert(s_ == nullptr);
s_ = s;
obj_ref_ = luaL_ref(s, LUA_REGISTRYINDEX);
}
auto Lua::callMethod(std::string name) -> void {
if (!s_ || !obj_ref_) {
return;
}
lua_rawgeti(s_, LUA_REGISTRYINDEX, *obj_ref_);
lua_pushlstring(s_, name.data(), name.size());
if (lua_gettable(s_, -2) == LUA_TFUNCTION) {
lua_pushvalue(s_, -2);
lua::CallProtected(s_, 1, 0);
} else {
lua_pop(s_, 1);
}
lua_pop(s_, 1);
}
auto Lua::forEachBinding(std::function<void(lua::Binding*)> fn) -> void {
if (!s_ || !obj_ref_) {
return;
}
lua_rawgeti(s_, LUA_REGISTRYINDEX, *obj_ref_);
lua_pushliteral(s_, "bindings");
if (lua_gettable(s_, -2) != LUA_TTABLE) {
lua_pop(s_, 2);
return;
}
lua_pushnil(s_);
while (lua_next(s_, -2) != 0) {
lua::Binding* b = lua::Binding::get(s_, -1);
if (b) {
std::invoke(fn, b);
}
lua_pop(s_, 1);
}
lua_pop(s_, 2);
}
} // namespace screens
} // namespace ui
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